Soda-boiler steam-power plant.



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Patented June 11,1912.

RAYMOND DEQUEVILLEY-MONTJUSTIN, 0F KIEL, GERMANY.

SODA-BOILER STEAM-POWER PLANT.

Specification of Letters Patent. PatentedJune 11, 1912.

Application led February 11, 1909. Serial No. 477,455.

To all 'whom t may concern.'

Be it known that I, RAYMOND DEQUE VILLnY-MONTJUSTIN, a subject of theKing of Spain, residing at 94 Feldstrasse, Kiel, Germany, have inventedcertain new and useful Improvements in Soda-Boiler Steam- Power Plants,of which the following is a specification.

The present invention relates to such steam-power-plants in which thesteam for driving is generated in the usual manner, in a so called sodaboiler. In operation of such soda-boiler-steam-power plants, it has beenfound that it is inadvisable to return all of the exhaust steam from thesteam engine to the soda boiler, for absorbing; because in transferringall of the exhaust steam, the temperature and the pressure in the boilersystem will rise very rapidly. But the nearer the temperature of thesoda solution approaches the boiling point, the more will the capabilityof the soda for condensing the exhaust steam from the` steam enginediminish. As soon as the soda solution has reached the boiling point,its absorbing property ceases altogether. It has therefore beenproposed, in order to prevent such a break down in the running, and tokeep the absorbing property lasting in the soda, to return only a partof the exhaust steam from the steam engine to the soda, and to'blow olfthe rest of the exhaust steam into the atmosphere.

The object of this invention is therefore to utilize this remaining, andtill now useless part of the exhaust steam of the engine. This object isattained according to the present invention, by providing a separatesteam engine connected to the condenser beside the principal steamengine which is connected to the soda receptacle; that portion of thesteam, not: conducted into the soda boiler', producing work in the firstmentioned engine.

Different types of steam power plants are shown diagrammatically in thedrawing as examples for carrying out the invention, Figures l and 6showing plants where the fresh steam generated in the soda-boiler,already divided before entering the steam engine; while Figs. 2 to 5show plants where tirst a division of the exhaust steam is al.- lowed.Fig. l shows a complete steam power plant consisting of a soda boiler, a

steam engine and a condenser; while, Figs. 2 to 6 are confined todifferent types of steam engines with a condenser and the necessarypiping.

Reference will first be made to the steam power plant shown in Fig. 1.It consists principally of a soda boiler A B, a twin steam engine C Cwith pistons, and condenser D. Furthermore, the soda steam boilerconsists of a soda receptacle A surrounded by a water evaporating tankB. From the steam space o of the tank B, a pipe E for live steam leadsto the cylinders C C of the steam engine. In the pipe E, between thecylinders C, C is attached a throttling-valve c and by means of this,the steam, conducted through the pipe, may be regulated to enter theengine in required quantities. The steam cylinder C is con* nected withthe soda receptacle A through the medium of the exhaustpipe F containinga check-valve f. The steam cylinder C is connected with the condenser Dthrough the medium of the exhaust pipe G, which is provided with aclosing valve g. The exhaust pipes G and F are connected with each otherby means of a pipe W, which has a closing valve w. Further, a pipe Hleads from the water chamber of the condenser D through a feed pump J,to the water chamber of the water evaporating tank B of the soda steamboiler.

During the operation of the described steam power plant, the live steam,generated in the water evaporating tank B, is con'- ducted through thepipe E to the working cylinders C, C. The steam will then be dividedbetween the two steam cylinders C, C in proportions suitable fordifferent conditions of the running, and this will be accomplished bythe suitable setting of the throttling valve c. For instance, thecylinder C may receive 80% and the cylinder C 20% of the liveV steam.With the valve w closed and the valve f opened, the exhaust steam fromthe steam cylinder C passes through the pipe F into the soda receptacleA, in which it is` absorbed by the soda, so that, in the usual manner,steam is generated in the water tank B. The exhaust steam from cylinderC, on the other hand, is conducted through the pipe G to the condenserD, from which the condensing water from time to time, may again beintroduced as feed water into the water tank B, by means of the feedpump J. The arrangement of the piping will, however, also permit, onspecial occasions of conducting the exhaust steam from both cylinders C,C of the steam engine, either into the condenser only, or into the sodareceptacle only.

In the steam power plant, in part shown in Fig. 2, it has been assumedthat the engine consists of a compound steam engine with piston, havinga high pressure cylinder K and two low pressure cylinders K', K2. Allthe live steam generated in the soda boiler in this engine is conductedby the pipe E to the high pressure cylinder K, and not until the steamhas performed its work in this cylinder, does the division take place,effected by the regulating of the throttled valve m. The steam inproportions of four to one (for instance) -is conducted to the lowpressure cylinders K', K2 through the piping L, M. The exhaust steamfrom the low pressure cylinder K is introduced into the soda receptaclethrough the pipe F; and the exhaust steam from the low pressure cylinderK2 into the condenser D through the pipe G. Even here, when needed, maythe total exhaust steam from all the cylinders be conducted either tothe condenser alone or to the soda receptacle alone.

Fig. 3 shows an ordinary compound steam engine with pistons, which hasits high pressure cylinder N and low pressure cylinder N connected witheach other by a pipe O. The pipe F, leading to the soda receptacle isbranched off from this pipe O, in which again a throttle valve 0 issituated. In this case, the throttle valve 0, governing the division ofthe steam, is arranged in that part of the pipe O, which is locatedbetween the low pressure cylinder N and the place where pipe E isbranched off. The pipe lV connects the exhaust-pipe G of the lowpressure cylinder with the exhaust pipe F. The steam, l conductedthrough the live steam piping, is working in the high pressure cylinderN, and about 80% of the total exhaust steam quantity goes through thepipe F to the soda solution, while the remaining 20% produces work inthe low pressure cylinder N and after that, is carried through the pipeG to the condenser.

The steam power plant illustrated in Fig.

4 shows the application of the invention to a triple-expansion steamengine, which has its high pressure cylinder P, mean-pressure cylinder Pand low pressure cylinder P2 connected with each other by means of theconnecting pipes Q and R. In this case, the exhaust pipev F leading tothe soda receptacle communicates with the connection Q as well as theconnection R. The connections Q and R are provided with throttlingvalves g and r and the exhaust pipe F is provided with check-valves fand f2. The low-pressure cylinder P2 communicates with the condenser bymeans of a pipe Gr. And the exhaust pipes G and F are connected witheach other by,a pipe W. As long as the re action in the soda receptacleA does not exceed a certain pressure, the operation of the motor of thissteam power plant is eected in this manner; that all the live steam insequence operates the high pressure cylinder P and the mean-pressurecylinder P and then, by suitable adjustment of the throttling valve r',about 20% of the steam is supplied to the low pressure cylinder, and 80%to the soda-receptacle A, through the pipe F. The check valves f and ware closed during this operation, while the throttling valve g and thecheck valves f2, f and g are opened. Should the reacting pressure in thesoda receptacle, gradually increasing during the operation, exceed thepermissible limit, the quantity of steam, 80%, supplied to thesodareceptacle, will be drawn olf by the connecting pipe Q, where acorrespondingly higher pressure exists. This is accomplished on the onehand by closing the check valves f, f2 and opening the check valve f aswell as the throttling valve 11, and on the other hand by adjusting thethrottling valve g, to suit the required steam consumption. The exhauststeam from the low pressure cylinder P2 is always carried to thecondenser D.

The steam power plant shown in Fig. 5 is based on the use of athree-st-age steam turbine. The casings S, S, S2 of the threepressure-stages in Vthis turbine, correspond in the same order to thecylinders P, P, P2 of the triple expansion engine in Fig. 4, and theoperation is practically the same. The arrangement of the connectingpipes T and U between the separate pressure stages corresponds also withthe connections Q and R in the engine of Fig. 4. When the pressure inthe soda receptacle A is comparatively low, the steam to be conducted tothe soda receptacle is taken from the connecting pipe `U, and when thepressure becomes higher the steam is taken from the connecting pipe Tjust as in the above described triple expansion engine. The arrangementof the check and throttling valves f, f', f2, t, u, g, fw corresponds tothe arrangement of the check and throttling valves in the engine of Fig.4.

The power plant illustrated in Fig. 6 shows ythe application of theinvention to a steam turbine consisting of two parts V, V. Thearrangement of the piping E, F, G, V corresponds to the arrangementshown in Fig. l. As is the case of the twin cylinder steam engine shownin Fig. l, the live steam is here divided, so that, by proper adjustmentof the throttling valve e, 80% thereof is given to the turbine V and 20%to the turbine V. The exhaust steam from turbine V is conducted to thesoda receptacle and the exhaust steam from the other turbine V to thecondenser. rI`his steam, which has been ejected as useless in theheretofore known working methods, is now in all of the above describedsteam power plants utilized for driving the machinery, besides beingrecovered in the form of feed water for the boiler. The last mentionedadvantage is of less consequence in stationary engines and locomotives;but, in such cases, where the extremely limited space puts the greatestvalue on the saving of the evaporated water, as for instance insubmarine boats, it is of the greatest importance.

Should the absorbing property of the soda be diminished in consequenceof its thinness at the end of the process, this property must beincreased in the ordinary way through heating.

I claim l. A steam power plant comprising a primary engine, a soda steamgenerating boiler connected therewith and adapted to supply powerthereto, said engine adapted to return a portion of its exhaust to saidsoda boiler, a separate secondary engine connected with and adapted toreceive the remaining exhaust from the primary engine, and a condenserconnected with said secondary engine.

2. A steam power plant comprising a multi-cylinder compound engine,divisible into two or more pressure units, a soda steam generatingboiler having a soda receptacle, a condenser, means connecting thecylinders of the engine with the soda boiler and the condenser, andcontrolling means in said connection adapted to effect communication ofthe cylinders with each other and with the soda receptacle of theboiler, whereby said soda receptacle may receive the ex haust from oneor more of the cylinders and the other cylinders may receive theremaining exhaust as the power medium from the first named cylinders.

3. A steam power plant comprising twin steam engines, a soda steamgenerating boiler communicating with the engines, and having meanswhereby the live steam Jfrom said boiler may be divided between theengines and means whereby the exhaust steam from one of the engines maybe returned to the generating boiler.

4l. A steam power plant comprising a primary and a separate secondaryengine, a soda steam generating boiler connected with. and adapted tosupply live steam to said engines separately or together, a condenser,and means whereby the exhaust steam from one of the engines is returnedto the soda boiler, and the exhaust from the other engine is conductedto the condenser.

5. A steam power plant comprising a compound steam engine having a highpressure and two similar low pressure cylinders in communication, a sodasteam generating boiler having a soda receptacle, a condenser; one ofsaid low pressure cylinders communieating with and adapted to return itsexhaust steam to the soda receptacle, the other low pressure cylindercommunicating with and adapted to deliver its exhaust steam to thecondenser, and a throt-tling valve intermediate the high pressurecylinder and said last named low pressure cylinder for controlling thepassage of steam therebetween.

6. A steam power plant comprising a compound engine having a highpressure and a low pressure cylinder, a communicating connection betweenthe cylinders, a soda steam generating boiler having a soda receptacle,a communicating connection between the high pressure cylinder and saidboiler, a pipe connecting the connection between the cylinders with thesoda receptacle and adapted to conduct exhaust steam to said sodareceptacle, a condenser, a pipe connecting the low pressure cylinderwith the condenser and adapted to co-nduct the exhaust steam from saidcylinder to the condenser, and a thrott-ling valve in the conneet-ionbetween the cylinders for controlling the passage of steam therebetween.

7 A steam power plant comprising a multiple expansion steam enginehaving communicating connections between the cylinders thereof, a sodasteam generating boiler having a soda receptacle, pipes connecting thesoda receptacle with the connections between the cylinders of the engineand adapted to receive a portion ot the exhaust steam from saidcylinders, a condenser having communication with the lowest pressurecylinder of the engine and adapted to receive the exhaust therefromregulating valves in the communicating connections between thecylinders, and regulating valves in the connecting pipes between thesoda receptacle and the cylinder connections, whereby said last namedconnections may be separately brought into communication with the sodareceptacle.

S. A steam power plant comprising a multiple expansion steam enginehaving communicating connections between the cylinders thereof, a sodasteam generating boiler having a soda receptacle, pipes connecting thesoda receptacle with the communicating connections between the cylindersof the engine and adapted to receive a portion of the exhaust steam fromthe cylinders, a condenser having communication with the lowest pressurecylinder of the engine and adapted to receive the exhaust therefrom, andregulating valves in the pipes connecting the soda receptacle and thecommunicating connections between the cylinders; said soda receptacleadapted to have communication With the connection be- The foregoingspecification signed at tween the intermediate and 10W pressure cyl-Kiel, Germany, this 27th day of January, inder When the reactingpressure in the soda 1909 receptacle is 10W, and adapted to havecommunication with the connection between the intermediate and highpressure Cylinder when said reacting pressure is high.

RAYMOND DEQUEVILLEY-MONTJUSTIN. In presence of-` JULIUs Boum,

HUGO LIEBELT.

Copies of this patent may be obtained for ve cents each, by addressingthe Commissioner of Patents,

' Washington, D. C.

